| 主权项 |
1. An inter-frame mode selection method for video coding, the inter-frame mode selection method comprising:
step (a): determining a current optimum coding mode and coding overhead of a coding unit CUDepth in a current depth Depth, an initial value of the current depth Depth being 1; step (b): dividing the coding unit CUDepth into multiple coding subunits having a depth Depth+1, and recursively performing step (a) to step (d) for each of the coding subunits until the depth of the coding subunit reaches a preset maximum depth or satisfies a division stopping condition, to determine an optimum coding mode and a coding overhead of each coding subunit; step (c): comparing a sum of coding overheads of the multiple coding subunits with the current coding overhead of the coding unit CUDepth; and step (d): if the current coding overhead of the coding unit CUDepth is greater than the sum of the coding overheads of the multiple coding subunits, determining that an optimum coding mode of the coding unit CUDepth is a coding mode, which is optimum after the coding unit CUDepth is divided into the multiple coding subunits; otherwise, determining that an optimum coding mode of the coding unit CUDepth is the coding mode, which is optimum before the coding unit CUDepth is divided into the multiple coding subunits, in a case in which calculation of the coding overhead required for coding the coding unit CUDepth having the current depth Depth is to be skipped, steps (b), (c), and (d) are sequentially invoked, and in a case in which the calculation of the coding overhead required for coding the coding unit Depth having the current depth CUDepth is not to be skipped, steps (a), (b), (c), and (d) are sequentially invoked. |
